https://www.scientificamerican.com/article/this-bat-recorded...
I was surprised to learn how high the bats and migrating birds are flying - more than 1,000 meters during the "searching" phase.
They would likely be invisible from the ground without really good binoculars.
>giant noctule bats kill birds with a strong bite and then bite off their wings, probably to reduce weight and air resistance. Then the bird is eaten during flight.
https://www.scientificamerican.com/article/this-bat-recorded...
I was surprised to learn how high the bats and migrating birds are flying - more than 1,000 meters during the "searching" phase.
They would likely be invisible from the ground without really good binoculars.